<%@ page language="java" contentType="text/html;
charset=utf-8"
         pageEncoding="utf-8" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD
HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type"
          content="text/html; charset=ISO-utf-8">
    <title>登录</title>
    <style>
        #a {

            width: 50%;
            height: 200px;
            border: 1px dashed;
            background-color: lightyellow;
            text-align: center;
        }

        body {
            background-color: lightblue;
        }
    </style>
</head>
<body>
<div id="a">

</div>
</body>
</html>

